PERSPECTIVE IMPROVEMENT FOR IMAGE AND VIDEO APPLICATIONS
First Claim
1. A method for reducing distance-based distortion in an image of a face of a person, the image being captured by a camera, where the distance-based distortion is due to differences in distance from the camera to different parts of the face, the method comprising:
- capturing an image of the face;
if the person is too close to the camera;
increasing a zoom of the camera;
obtaining a zoomed image of the face; and
displaying the zoomed image of the face to the person so as to prompt the person to move farther from the camera.
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Abstract
A system and method for reducing distance-based distortion in a camera image of an object, where the distanced-based distortion is due to differences in distance from the camera to different parts of the object. In one approach, the distortion is reduced by estimating distances to different parts of the object and then generating a reprojected image of the object dependent upon the estimated distances and upon a virtual viewpoint that is more distant than the camera from the object. In a further approach, the image is warped such that points in the image match corresponding points in one or more stored templates. In a still further approach, if excessive distortion is present in the image, the camera zoom is increased and a magnified image is displayed, prompting a person to move farther from the camera thereby reducing the distortion.
40 Citations
28 Claims
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1. A method for reducing distance-based distortion in an image of a face of a person, the image being captured by a camera, where the distance-based distortion is due to differences in distance from the camera to different parts of the face, the method comprising:
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capturing an image of the face; if the person is too close to the camera; increasing a zoom of the camera; obtaining a zoomed image of the face; and displaying the zoomed image of the face to the person so as to prompt the person to move farther from the camera. - View Dependent Claims (2, 3)
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4. A method for reducing distance-based distortion in an image of an object, the image being captured by a camera, where the distance-based distortion is due to differences in distance from the camera to different parts of the object, the method comprising:
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estimating distances to different parts of the object; and generating a reprojected image of the object dependent upon the estimated distances and upon a virtual viewpoint that is more distant than the camera from the object. - View Dependent Claims (5)
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6. A method for reducing distance-based distortion in an image of an object, the image being captured by a camera, where the distance-based distortion is due to differences in distance from the camera to different parts of the object, the method comprising:
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for each template of at least one template of the object, determining a set of warping parameters that relate points in the image to corresponding points in the template of the object; selecting from the set of warping parameters for each of the at least one template, the set of warping parameters that results in the best match between the warped image and the corresponding template; and warping the image using the selected set of warping parameters. - View Dependent Claims (7, 8)
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9. A system for reducing distance-based distortion in an image of a face of a person, the system comprising:
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a camera operable to capture an image of the face; a display unit operable to display the image of the face to the person in an image frame; and a processor operable to control the magnification of the displayed image such that the displayed image of the face is too large to fit in the image frame when the person is too close to the camera. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A system for reducing distance-based distortion in an image of an object, the system comprising:
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a camera operable to capture an image of the object; an estimation element operable to estimate distance-based distortion in the captured image; a processing element operable to process the captured image to reduce distance-based distortion in the captured image. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A system for reducing distance-based distortion in an image of an object, the system comprising:
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a camera operable to capture an image of the object; a means for estimating distance-based distortion in the captured image; a means for processing the captured image to reduce distance-based distortion in the captured image. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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Specification